Forum Discussion
bobndot
Sep 14, 2016Explorer II
Seal the flap shut, then see if this marine scupper valve would fit , screwed to the flap. It would probably open from the fan speed then return closed when the fan is off.
http://www.newegg.com/Product/Product.aspx?Item=9SIA67K2K32036&nm_mc=KNC-GoogleMKP-PC&cm_mmc=KNC-GoogleMKP-PC-_-pla-_-AT+-+Plumbing-_-9SIA67K2K32036&gclid=Cj0KEQjwx96-BRDyzY3GqcqZgcgBEiQANHd-npKUzIRp--lL-a3Xl62XE70SvGO0fkX_XA7rkxQl9qYaArkk8P8HAQ&gclsrc=aw.ds
http://www.newegg.com/Product/Product.aspx?Item=9SIA67K2K32036&nm_mc=KNC-GoogleMKP-PC&cm_mmc=KNC-GoogleMKP-PC-_-pla-_-AT+-+Plumbing-_-9SIA67K2K32036&gclid=Cj0KEQjwx96-BRDyzY3GqcqZgcgBEiQANHd-npKUzIRp--lL-a3Xl62XE70SvGO0fkX_XA7rkxQl9qYaArkk8P8HAQ&gclsrc=aw.ds
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